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Hey Stew,
I've always thought of silica gel desiccant as applicable for small, tight
packages, but not really effective for something the size of a small
submersible. However I might be way off base on that. The cost
is somewhat less than expected, so it's definitely worth a try. Since the
environment in a sub in warm weather can be very humid, it might require a lot
more SG than the charts indicate. At the least it could be a
good measure to take when the sub is stored in the garage with the hatch locked
down of course.
From what Sean has shared today, it sounds like putting a desiccant inline
before the scrubber could make the air too dry for optimum operation of
the scrubber. However if the air in the sub feels like a steam bath, you
might want to find a way to remove some of the moisture before it enters the
scrubber.
Thanks for the links. Think I'll try some when the time comes.
Jim
In a message dated 3/15/2011 9:10:25 P.M. Central Daylight Time,
stew@terminalsolutions.biz writes:
Silica
Gel ? but that would also mean a further reduction of space…
http://en.wikipedia.org/wiki/Silica_gel
http://www.theruststore.com/Silica-Gel-FAQ-W40C2.aspx
Maybe
the silica gel could be put into a secondary cartridge before the soda lime???
J
From:
owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of
JimToddPsub@aol.com
Sent: Wednesday, 16 March 2011 5:52
AM
To: personal_submersibles@psubs.org
Subject:
[PSUBS-MAILIST] Humidity control
To
pick up on humidity control in general which you mentioned: This is a
topic which affects a number of things in a sub other than scrubber
performance and it's worthy of its own thread. In a small one or two man
sub powered completely by batteries it seems to be difficult to manage.
I'd be very interested in what anyone has to offer on the
topic. We've had a prior discussion on a portable cooling
unit which would condense some of the cabin
moisture.
In a
message dated 3/15/2011 12:25:50 P.M. Central Daylight Time, cast55@telus.net
writes:
In
a submersible, the problem is more easily avoided, since it takes some time
for the cabin air to get close to 100% RH, and there are ways a designer can
condense out or otherwise remove moisture from the cabin air to push it
down.
ABS standard is a relative humidity
between 30 and 70% RH, and this is
probably what you should shoot for.
(50% RH is often quoted as a desirable
target for human comfort in
terrestrial
buildings). |